2D/2D coupled MOF/Fe composite metamaterials enable robust ultra-broadband microwave absorption.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38969643.
- Also identified by DOI 10.1038/s41467-024-49762-4 and PMC identifier 11226717.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The combination between macroscopic structure designs and microscopic material designs offers tremendous possibilities for the development of advanced electromagnetic wave (EMW) absorbers. Herein, we propose a metamaterial design to address persistent challenges in this field, including narrow bandwidth, low-frequency bottlenecks, and, particularly, the urgent issue of robustness (i.e., oblique, and polarized incidence). Our absorber features a semiconductive metal-organic framework/iron 2D/2D assembly (CuHT-FCIP) with abundant crystal/crystal heterojunctions and strong magneto-electric coupling networks. This design achieves remarkable EMW absorption across a broad range (2 to 40 GHz) at a thickness of just 9.3 mm. Notably, it maintains stable performance against oblique incidence (within 75°) and polarizations (both transverse electric and transverse magnetic). Furthermore, the absorber demonstrates high specific compressive strength (201.01 MPa·cm<sup>3</sup>·g<sup>-1</sup>) and low density (0.89 g·cm<sup>-3</sup>). This advancement holds promise for developing robust EMW absorbers with superior performance.